{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "In this paper , the fabrication , characterization , and application in oxygen sensing are reported for a novel multifunctional nanomaterial of [ Ru ( bpy ) ( 2 ) phen - MMS ] ( bpy , 2 , 2 ' - bipyridyl ; phen , phenathrolin ) which was simply prepared by covalently grafting the ruthenium ( II ) polypyridyl compounds into the channels of magnetic mesoporous silica nanocomposites ( MMS ) ."}
{"Chemical": ["oxygen", "Ru ( bpy ) ( 2 ) phen", "bpy", "phen", "2 , 2 ' - bipyridyl", "phenathrolin", "ruthenium ( II ) polypyridyl", "silica"]}